Analysis

  • max time kernel
    141s
  • max time network
    125s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231130-enlocale:en-usos:windows10-2004-x64system
  • submitted
    08/12/2023, 09:18

General

  • Target

    INVOICE0987650009.exe

  • Size

    757KB

  • MD5

    49eca8d1b29bfaec20599239db6f10da

  • SHA1

    ee605018797e3a9408e24b7ec0767ef5e096ac16

  • SHA256

    dfd724316cb0edbf1212cbf5e71f007d22b7a38e7860d96d4d4bedf17eaa85ea

  • SHA512

    a0d1d7910314cc76bdfa46b6f8cdc9909d850f7fe320be943c16bb6da86b213b23148b331626492a07fedda1932e9d09d4fd10faeb00171e43cdd801cfb71220

  • SSDEEP

    12288:HDWMD9ehE+uDneLBQt20dup/20AQBOLdxD4N1fahKDwancwk6pvxT0K0jlyOJN9I:FefZ27zZPdnjImBOQX

Score
10/10

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

107.175.229.139:8087

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-IZFV1M

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

  • Drops startup file 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Program crash 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\INVOICE0987650009.exe
    "C:\Users\Admin\AppData\Local\Temp\INVOICE0987650009.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:4776
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
      "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\INVOICE0987650009.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'
      2⤵
      • Drops startup file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4344
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
      2⤵
        PID:4432
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4432 -s 532
          3⤵
          • Program crash
          PID:640
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4432 -ip 4432
      1⤵
        PID:1320

      Network

            MITRE ATT&CK Matrix

            Replay Monitor

            Loading Replay Monitor...

            Downloads

            • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mvhstncf.dof.ps1

              Filesize

              60B

              MD5

              d17fe0a3f47be24a6453e9ef58c94641

              SHA1

              6ab83620379fc69f80c0242105ddffd7d98d5d9d

              SHA256

              96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

              SHA512

              5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

            • memory/4344-18-0x0000000005E40000-0x0000000005EA6000-memory.dmp

              Filesize

              408KB

            • memory/4344-43-0x0000000006A50000-0x0000000006A6A000-memory.dmp

              Filesize

              104KB

            • memory/4344-48-0x0000000074740000-0x0000000074EF0000-memory.dmp

              Filesize

              7.7MB

            • memory/4344-44-0x0000000006AA0000-0x0000000006AC2000-memory.dmp

              Filesize

              136KB

            • memory/4344-42-0x0000000007530000-0x00000000075C6000-memory.dmp

              Filesize

              600KB

            • memory/4344-26-0x00000000065C0000-0x000000000660C000-memory.dmp

              Filesize

              304KB

            • memory/4344-8-0x0000000074740000-0x0000000074EF0000-memory.dmp

              Filesize

              7.7MB

            • memory/4344-11-0x0000000002CF0000-0x0000000002D00000-memory.dmp

              Filesize

              64KB

            • memory/4344-10-0x00000000056A0000-0x0000000005CC8000-memory.dmp

              Filesize

              6.2MB

            • memory/4344-9-0x0000000002CF0000-0x0000000002D00000-memory.dmp

              Filesize

              64KB

            • memory/4344-7-0x0000000002BE0000-0x0000000002C16000-memory.dmp

              Filesize

              216KB

            • memory/4344-19-0x0000000005F20000-0x0000000005F86000-memory.dmp

              Filesize

              408KB

            • memory/4344-25-0x0000000006570000-0x000000000658E000-memory.dmp

              Filesize

              120KB

            • memory/4344-17-0x0000000005530000-0x0000000005552000-memory.dmp

              Filesize

              136KB

            • memory/4344-24-0x0000000006090000-0x00000000063E4000-memory.dmp

              Filesize

              3.3MB

            • memory/4432-29-0x00000000002D0000-0x0000000000352000-memory.dmp

              Filesize

              520KB

            • memory/4432-36-0x00000000002D0000-0x0000000000352000-memory.dmp

              Filesize

              520KB

            • memory/4432-41-0x00000000002D0000-0x0000000000352000-memory.dmp

              Filesize

              520KB

            • memory/4776-1-0x0000000074740000-0x0000000074EF0000-memory.dmp

              Filesize

              7.7MB

            • memory/4776-3-0x0000000005580000-0x000000000562E000-memory.dmp

              Filesize

              696KB

            • memory/4776-6-0x0000000005850000-0x00000000058EC000-memory.dmp

              Filesize

              624KB

            • memory/4776-27-0x00000000056D0000-0x00000000056D8000-memory.dmp

              Filesize

              32KB

            • memory/4776-32-0x0000000074740000-0x0000000074EF0000-memory.dmp

              Filesize

              7.7MB

            • memory/4776-5-0x0000000005710000-0x00000000057A2000-memory.dmp

              Filesize

              584KB

            • memory/4776-0-0x0000000000B70000-0x0000000000C34000-memory.dmp

              Filesize

              784KB

            • memory/4776-4-0x0000000005BE0000-0x0000000006184000-memory.dmp

              Filesize

              5.6MB

            • memory/4776-2-0x0000000005570000-0x0000000005580000-memory.dmp

              Filesize

              64KB